Research Articles, Department of Fish and Wildlife Conservation
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Gray-bellied Hawk (Accipiter Poliogaster) Observed Feeding on a Tinamou in Yasuni Biosphere Reserve, Ecuador
(Raptor Research Foundation, 2013)The Gray-bellied Hawk (Accipiter poliogaster) is one of the least studied birds of prey in the neotropics. Its geographical range in South America is from northern Colombia, east to southern Venezuela and the Guianas, south ... -
Preventing Raptor Electrocutions in an Urban Environment
(Raptor Research Foundation, 2007)Electrocution of raptors on poles supporting overhead electric lines is a cause of concern in the United States. Techniques for modifying (i.e., retrofitting) potentially lethal poles to reduce electrocutions have been ... -
Electric Shock Injuries in a Harris's Hawk Population
(Raptor Research Foundation, 2006)Electrocution may be an important agent of mortality in many raptor populations, and has been implicated as a contributing factor in the endangerment of some species. In Tucson, Arizona U.S.A. the electrocution of Harris's ... -
Return Rates of Aluminum Versus Plastic Leg Bands from Electrocuted Harris's Hawks (Parabuteo Unicinctus)
(Raptor Research Foundation, 2009)Ecological research programs investigating dispersal, migration, habitat selection, social structure, survival, reproductive success, and population size depend on the ability to identify individual study animals on multiple ... -
Correlation of Cere Color with Intra- and Interspecific Agonistic Interactions of Crested Caracaras
(Raptor Research Foundation, 2014)Bright coloration in birds is an important indicator of individual quality often used in social displays. Structural, carotenoid-, and melanin-based colors are long-lasting, widespread, and widely studied. Hemoglobin-based ... -
Ospreys Use Bald Eagle Nests in Chesapeake Bay Area
(Raptor Research Foundation, 1993)Ospreys (Pandion haliaetus) and Bald Eagles (Haliaeetus leucocephalus) share similar breeding habitat in the Chesapeake Bay area and elsewhere. The nests of these species are similar in size and appearance. Ospreys typically ... -
Subordinate Males Sire Offspring in Madagascar Fish-eagle (Haliaeetus Vociferoides) Polyandrous Breeding Groups
(Raptor Research Foundation, 2002)The island endemic Madagascar Fish-Eagle (Haliaeetus vociferoides) is one of the most endangered birds of prey. Certain populations in west-central Madagascar sometimes exhibit a third, and sometimes a fourth, adult involved ... -
Nesting and Perching Habitat Use of the Madagascar Fish-Eagle
(Raptor Research Foundation, 2002)We documented Madagascar Fish-Eagle (Haliaeetus vociferoides) nest and perch use on lakes and rivers and compared parameters of used trees to unused reference trees. Nest and perch trees were broader and taller, had more ... -
Using Historical Atlas Data to Develop High-Resolution Distribution Models of Freshwater Fishes
(Public Library of Science, 2015-06-15)Understanding the spatial pattern of species distributions is fundamental in biogeography, and conservation and resource management applications. Most species distribution models (SDMs) require or prefer species presence ... -
Spontaneous Magnetic Alignment by Yearling Snapping Turtles: Rapid Association of Radio Frequency Dependent Pattern of Magnetic Input with Novel Surroundings
(Public Library of Science, 2015-05-15)We investigated spontaneous magnetic alignment (SMA) by juvenile snapping turtles using exposure to low-level radio frequency (RF) fields at the Larmor frequency to help characterize the underlying sensory mechanism. ... -
The application of microsatellite DNA markers for forensic analysis of koi carp (Cyprinus carpio)
(Academy of Science of South Africa, 2005)We describe the use of microsatellite DNA markers, previously developed for common carp, to investigate a forensic case involving ornamental koi carp. Two South African breeders offered koi strains for sale, which a third ... -
Threatened predator on the equator: multi-point abundance estimates of the tiger Panthera tigris in central Sumatra
(Cambridge University Press, 2013-04)Information on spatial and temporal variation in abundance is crucial for effective management of wildlife. Yet abundance estimates for the Critically Endangered Sumatran tiger Panthera tigris sumatrae are lacking from ... -
The use of camera traps for estimating jaguar Panthera onca abundance and density using capture/recapture analysis
(Cambridge University Press, 2004-04)Across their range jaguars Panthera onca are important conservation icons for several reasons: their important role in ecosystems as top carnivores, their cultural and economic value, and their potential conflicts with ... -
Ocelot Leopardus pardalis in Belize: the impact of trap spacing and distance moved on density estimates
(Cambridge University Press, 2007-10)We used remote cameras to obtain information on an elusive species and to examine the effects of different camera trapping methodologies on abundance estimates. We determined activity pattern, trail use, trap success, and ... -
The impact of forest logging and fragmentation on carnivore species composition, density and occupancy in Madagascar's rainforests
(Cambridge University Press, 2012-07)Forest carnivores are threatened globally by logging and forest fragmentation yet we know relatively little about how such change affects predator populations. This is especially true in Madagascar, where carnivores have ... -
Embryonic Developmental Patterns and Energy Expenditure Are Affected by Incubation Temperature in Wood Ducks (Aix sponsa)
(University of Chicago Press, 2011-09)Recent research in birds has demonstrated that incubation temperature influences a suite of traits important for hatchling development and survival. We explored a possible mechanism for the effects on hatchling quality by ... -
Moderate echinostoma trivolvis infection has no effects on physiology and fitness-related traits of larval pickerel frogs (rana palustris)
(American Society of Parasitology, 2009-08)High intensity infections of Echinostoma trivolvis is metacercariae decrease survival and growth of young amphibian larvae. However, in nature, parasites are highly aggregated, which results in a large proportion of the ... -
Calibrating virtual population analysis for fisheries stock assessment
(EDP SCIENCES, 2008-04)Virtual population analysis (VPA) is often used for assessing freshwater and marine fisheries resources. One important component in VPA is to calibrate abundance estimates with a time series of abundance indices. One of ... -
Prosomal-width-to-weight relationships in American horseshoe crabs (Limulus polyphemus): examining conversion factors used to estimate landings
(National Marine Fisheries Service Scientific Publication Office, 2009-04)Horseshoe crabs (Limulus polyphemus) are valued by many stakeholders, including the commercial fishing industry, biomedical companies, and environmental interest groups. We designed a study to test the accuracy of the ... -
Evaluating methods for estimating rare events with zero-heavy data: a simulation model estimating sea turtle bycatch in the pelagic longline fishery
(National Marine Fisheries Service Scientific Publication Office, 2012-07)Estimating rare events from zero-heavy data (data with many zero values) is a common challenge in fisheries science and ecology. For example, loggerhead sea turtles (Caretta caretta) and leatherback sea turtles (Dermochelys ...
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